Process of coating thread.



E. D. C. BAYNE & L. A. SUBERS.

PROCESS 0F GOATING THREAD.

APPLIUATION FILED JAN. 21, 1907. BENEWBD DBO. 22, 1908.

Patented Aug. 3, 1909.

UNITED STATES PATENT oEEroE.

- EUGENE D. o. BAYNE AND 'LAWRENCE A. sUBERs, or oLEvEpAND, omo.

Pnoenss or comme man).

No. 929,651. p

speeiacatibn of Letters Patent.

Patented Aug. s, 1909.

Original application' led November 19, 1906, Serial No. 344,094. Divided and this application med January 2.1, 19078e1'1a1 No. 353,351. Renewed December 22, 1908.4 Serial No. 468,859.

To all rthom 'it may cof/teem:

Be it known that we, EUGENE D. C. BAYNE and LAWRENCE A. SUBERs, citizens'of the United States, and residents of Cleveland, county of Cuyahoga, State of Ohio, have invented certain new and useful Improvements in Processes of Coating Thread, of which we hereby declare the following to be a full, clear, andv exact description, such as will enable others skilled in the art to which it rsppertains to make and use the same.

, surface which can be vulcanized afterward and from which fabric can beconstructed simply by pressing the surfaces of the insulating' threads to ether into intimate contact whereby when t e completed fabric is vulcanized the structure becomes substantially an integral one.v 4

The art or'method has reference first to a degreasin process to render the iibers clean so that t` e insulating or coating material compound will adhere thereto, second to the part1cular treatmentof the thread to open up the fibers so,as to be receptive of the coat` ing material which is ap lied in a semi-fluid or viscous condition so tnat it will be readily absorbed among the fibers by capillary attraction.

' The next feature ofthe rocess consists in drawing `the thread throug a series of baths of the coating material and in applying a gradually increasin thickness of the material upon the threa after it has absorbed as much thereof as possible among its fibers, b means of successive coating of the materia and also Vthoroughly drying each coating before the next is applied. The final process consists in compactmgand shaping the comleted coating to a perfectly smooth and cycontaining cleansing medium in which the thread is-immersed, a hood through which the thread passes and is immersed in a hot air blast'whlch serves to loosen and separate the'bers, and evaporate all residue of thev drical form ready for immediate apphca` ing the coating material to the threa and for drying and shaping the same; Fig. 2 is an end view of the same Fig. 3 is a detail view 'of one of the baths 4and coating tubes 'and forming rollers'and Fig. 4 is a plan view of the forming rollers.

We carry out this process by first introducing the thread Twound upon a spool 1., into a suitable'degreasing bath of naphtha or other volatile grease dissolvin medium, as shown at 2 where it is thoroug y cleansed of all im- Ipurities, thence the thread asses through a ood 3 through which a b ast of hot comeatin and evaporating the nahtha or other egreasing medium and there y swelling the component fibers and thereby separating them, so that the coating fluid will permeateA the body of the thread. The thread is then passed throu h the rimary bath 4 of semi-viscid materia which 1s taken up by ca illary attraction into the opened bo'dy of t e thread and thus a foundation for the exterior insulation C is obtained to which it will cling and form a unitary mass therewith. This is of great importance since ordinarily a coatingof rubber or similar insulatin 'material will not enter the substance of a en or other hard twisted thread but will merely remain upon the surface from which it can be removed by stripping, but -when made unitary with the mass within the body of the thread it cannot be separated but becomes a part thereof.

The coating process is performed by means of the graduatedtube 6 followed by the cythan the thread, by means of which a thin coating of the material is a plied. The tube 6 is vertically placed, and t e thread is maintained in the exact center thereofby gravity an "fequally distributed coating is applied thereon. The next step in the processgis to thoroughly dry this coating and for this purpose it .passes through the hood 8 through which a forced natural air blast passes, thus fixing Vthe first coating. Another/coating is applied u on the first` insulation bymeans straight .tubes 9 and v10, the tube 10 ybeing of cleansing media. In this figure are also' shown coating baths and devices for a ply? ressed air passes which has the effect of lindrical tube 7, slightly larger in diameter as it hangs from the guiding roller 7 so that of a si ar bath '18 1-'and graduated and .'f

Slightly'larger diameter than the tube e, g1g-5f.

forced natural air blast through the hood 11'110 and the coated thread is completed andthe plastic coating compressed into a perfectl cylindrical form by means of Orooved rollers 12 and 13., the edges of whicl interlock to form a erfect die. f

.The t read and its successiveV coatings remain in the vertical position until the coating is dry, and hence the thread remains Vcentrally located therein which would not be the x case if the thread lay horizontally, since the plastic material would sag upon the thread. from its own weight.

The method or process just described results in a perfectly smooth coating of rubber or other vulcanizable material upon 'a' thread, located in the exact center thereof. The surface is also adhesive and in condition for applying in the manner specified in our app ication, Ser. No. 344,094, for an automatic tire winding machine.

The process is continued until a sufficient thickness of coating is obtained to provide the degree of flexibility required in the fabric of which the coated threads are component parts. 'The coating thus deposited upon the thread is thick enough to completely insulate. in the sense of isolate them from other threads o1' substances. That is, each thread is altogether out of contactwith others, but flexibly connected therewith in every fabric manufactured therefrom.v

This application is a division of our applii cation Ser. No. 344,094, filed Nov. 19 1906,

for tire winding machine,V

Having described the invention what we claim as new and desire to secure by Letters Patent is:

1. The herein described method of treating and coating a thread with a plastic and vulc'anizable material having a sticky surface, consisting of first cleaninggit in a volatile degreasing .medium from grease and impurities, separating the component fibers to make i it receptive of the coating materlahlhng the opened fibers with the coating com ound and distributing' over the exterior sur ace of the thread Van evenly disposed coating thereof,

drying the coating in a vertical position, alpplying a fresh coating thereto, and drying t e same in a vertical position untilv the coatings are of the desired thickness and finally compressing and forming the applied coatin s into a perfect cylindrical form between po ished surfaces, substantially as described. 2. Ihe method of forming a coated thread permeated with the coating compound consisting of opening the bers composing the thread by heat and the evaporation of a volai tile medium therein, filling the interstices between the fibers with the coating compound,

giving a succession of thin coatings evenly hands this 19th day of January, 1907,` at' Cleveland, Ohio.

EUGENE D. C. BAYNE. LAWRENCE A. SUBERS.` Witnesses:

A. T. OsBonN, Z. R. SAwrnR. 

